Hewby charles dicksoh



H. C. DICKSON.

, AND LIKE ELEMENT. MPL10/111011 FILED sEPT.12,1918.

TUBE, STAY, STRUT Patented June 17, 1919.

e ib.

HENRY CHARLES DICKSON, OIBIRMINGHAM, ENGLAND.

TUBE, STAY, STRUT, AND LIKE ELlEllv'IENT.A

To all 'whom t may concern:

Be it known that I, HENRY CiIARLEs DICK- soN, a subject of the Kingdom of Great Britain, residing at-Glengarth, Quinton, Birmingham, in the county of Stafford, England, manufacturer, have invented certain new and useful Improvements in or Re- Y lating to Tubes, Stays, Struts, and like Elements, said improvements being also appli-4 cable to the wings or planes, tall, body, and other parts of aerial craft, of which the following is a speciiication.

This invention comprises certain improvements in or relating to tubes, struts, stays, and like elements, said improvements being also applicable to the wings or planes, tail, body, and other parts of aerial craft.

According to the present invention, a tube or tubular member, which is advantageously of elongated transverse section, is provided with one or more internal Webs spanning lthe interior of the tube. These webs are composed of sheet metal, and they are flanged at their edgesadjacent to the wall of the tube. The sheet metal of which the wall of the tube is composed is formedf stream-shaped cross-section is composed of' two plates or strips'a, b of sheet 'metal joined together at the extremities lof thel elongated or streani-shaped cross-section of the tube. For this purpose at each end of the elongated or stream-shaped cross-section of the tube the said plates or -strips constituting the walls of the tube are bent outwardly through about 180 to a hook -formation. The two adjacent but" oppositely located hook formations appertaining to Specication -of Letters Patent.

Patented June i7, ioia.

Application filed September 12, 1918. Serial No. 253,818.

Y the respective side walls of the tube are At each of two points in eachsideA wall a., b of the tube the side wall is formed with two internal ribs d formed in the sheet metal of the tube wall, these ribs being lformed with a relatively small space between them and being bent toward each other to internally embrace the T-edge of an internal web spanning the interior of the tube. This internal web is composed of two layers c of sheet metal, each layer being flanged at both edges so that it is of shallow. ciannel-shape.

When the two webs are p aced together they Vassume a shallow H formation, and the' internal ribs'd in the tube walls serve to bind the duplex webs c together, and to the walls of the tube. The

two internal webs e may beincorporated at intervals of about one-third of the major dimension of the cross-section of the tube.

The invention may be embodied as the plane or wing of ,an aerial machine, for which purpose the crossesection of the tube is very substantially elongated in relation to its width or depth. The tube constituting this embodiment of the invention may be shaped to the forni' of a plane,.for which purpose it may be convex on one side and concave on the other.

The respective parts of the tube, strut, or equivalent element according to the present invention may be brazed', soldered, or equivalently secured together.

. What I claim as my invention and desire to secure by Letters Patent is 1. A frame element` provided with one or more internal webs spanning the interior of the tube, said web or webs being composed of sheet metal and being anged at its or their edges, and in which the sheet metal of which the wall of the tube is composed is v v formed with ribs "012 the equivalent which WhichT-head formation is embraced by two overlap the zmges of the internal Web or integral ribs of the tube Wall. Y l0 webs. In Witness whereof have hereunto set 2. A frame element as claimed in the first my hand n the presence of two Witnesses. claim, and in which the internal web or each HENRY CHARLES DICKSON. interna] web is formed of two layers of sheet Witnesses: metal, the zmges of which form at each ARTHUR H. BROWN,

edge of the duplex web L T-head formation, EDGAR N. WHEELER. 

